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1. Sfara V, Zerba EN, Alzogaray RA: Toxicity of pyrethroids and repellency of diethyltoluamide in two deltamethrin-resistant colonies of Triatoma infestans Klug, 1834 (Hemiptera: Reduviidae). Mem Inst Oswaldo Cruz; 2006 Feb;101(1):89-94
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  • [Source] The source of this record is MEDLINE®, a database of the U.S. National Library of Medicine.
  • [Title] Toxicity of pyrethroids and repellency of diethyltoluamide in two deltamethrin-resistant colonies of Triatoma infestans Klug, 1834 (Hemiptera: Reduviidae).
  • The aim of the currrent investigation was to evaluate (a) the toxicity of three pyrethroids (deltamethrin, lambda-cyhalothrin, and tetramethrin);.
  • (b) the effect of these insecticides on the locomotor activity; and (c) the repellent effect of N,N-diethyl-m-toluamide (DEET) on two deltamethrin-resistant strains of Triatoma infestans from Argentina (El Chorro and La Toma), and one susceptible strain.
  • The resistance ratios (RRs) obtained for the La Toma strain were: > 10,769, 50.7, and > 5.2 for deltamethrin, lambda-cyhalothrin, and tetramethrin respectively.
  • The RRs for the El Chorro strain were: > 10,769, 85.8, and > 5.2 for deltamethrin, lambda-cyhalothrin, and tetramethrin respectively.
  • The hyperactivity usually caused by the three pyrethroids was in both the deltamethrin-resistant strains compared to the susceptible reference strain.
  • No differences were observed in the repellent effect of DEET between the three groups.
  • These results indicate that the deltamethrin-resistant insects have a cross resistance to lambda-cyhalothrin and tetramethrin, and are also resistant to the first symptom of pyrethroid poisoning (hyperactivity).
  • However, the sensorial process related to DEET repellency does not appear to be altered.
  • [MeSH-major] DEET. Insect Repellents. Insecticides / toxicity. Motor Activity / drug effects. Pyrethrins / toxicity. Triatoma
  • [MeSH-minor] Animals. Lethal Dose 50. Nymph / drug effects

  • Hazardous Substances Data Bank. DEET .
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  • (PMID = 16699715.001).
  • [ISSN] 0074-0276
  • [Journal-full-title] MemoĢrias do Instituto Oswaldo Cruz
  • [ISO-abbreviation] Mem. Inst. Oswaldo Cruz
  • [Language] eng
  • [Publication-type] Journal Article; Research Support, Non-U.S. Gov't
  • [Publication-country] Brazil
  • [Chemical-registry-number] 0 / Insect Repellents; 0 / Insecticides; 0 / Pyrethrins; 134-62-3 / DEET
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